I was in at ARB on Saturday enquiring about safari snorkels. He asked if it was 08 or 09 as they are different due to the dual battery set up.
He said they make a safari snorkel for the dual battery set up.
He also mentioned not to turn the safari snorkel head backwards as this creates a vaccum affect and causes the engine to work harder and also suck more dust in when in a dusty environment.
His words were 'never turn the head backwards'.
ARB's rrp is $635 fitted versus rrp $690 from nissan fitted. I'm sticking with the genuine as there will be a little less hassle come warranty time if something is to go wrong down the track. If they start seeing different brands on items they sell then it leaves the door open a bit to voiding warranties i guess.
As a side issue the storeman mentioned to me that the reason '09 model ST-R's come out of thailand with dual battery's is that larger batteries are not as commonly used in that country, so 2 batteries are needed instead of just 1 larger unit. Im following this up with a contact at Nissan head office.